I I;D "TERRA NOVA" EXPEDITION. 



numbered one to eight, as they had all become detached from the bodv. and everv 

 vestige of web had disappeared. The funnel was in very bad condition and did not 

 -how funnel-organ. The anterior salivary glands were present mi the buccal bulb ; one 

 was oval, and the other somewhat heart-shaped; neither had the marginal indentation 

 figured by Isgood ('09, pi. 4, tig. 22) for .!/. n'rroxn. The sub-lingual salivary gland is 

 heart-shaped above, the narrow end just meeting the A-shaped indentation of the gular 

 lamina of the lower mandible. This upper part measures 25 x 30 mm., and the lower 

 surface of the gland is considerably longer, extending to a length of about 35 mm. 

 The upper mandible measures 50 mm. in length by 37mm. in breadth and 40mm. in 

 height ; the frontal lamina projects about 10 mm. beyond the palatine lamina : there is 

 no notch below the rostrum, but only a moderate scoop out between it and the inner 

 end of the ala ; the base of the palatine lamina is very straight. The lower mandible 

 measures 42 X 45 mm., and is also without a notch below the rostrum, the cutting edge 

 forming a gentle curve along the ala. The radula (Fig. 33) measures about 40mm. in 

 length by 5 mm. in breadth, a.nd the teeth are very dark horn-colour. The median 

 teeth are very broad, and without lateral denticles, and almost 

 triangular in shape; the anterior margin of the base of each is 

 usually marked by about nine indentations, the median three or 

 four showing through the half of the tooth immediately above it. 



... As will be seen bv a reference to the illustration, the first laterals 



l ( K;. 33.Moschites s]>., 



radula, x about 5. are somewhat like miniature editions of the median teeth, and, 

 while the second laterals call for no special remark, the outer 



laterals (instead of presenting the appearance usually depicted in representations of 

 cephalopod . radulae of these teeth e.g., that of claw-shaped teeth placed laterally, 

 and projecting over the bases of the second laterals) are arranged like the median 

 teeth, the base projecting equally on either side of the central denticle, and they 

 come between the median and first lateral teeth in size, and are not unlike them 

 in shape. 



A small species of Sepia, which I recently described under the name of N. Hrn/iirn 

 ( K!, p. 228, pi. 24, fig. 10), shows much the same variation in the appearance of the 

 outer laterals. The only other Cephalopod known to me presenting a somewhat similar 

 arrangement of these teeth is the large Uegopsid Symplectoteuthis I uniiiioxii (dorsal 

 mantle-length, 120-lGGmm. ) recently described by Sasaki ('15. p. 14S, text-fig. 4). 

 1'ossibly the contraction of the delicate membrane to which the teeth are attached 

 causes the outer lateral teeth to appear as usually drawn, and. under certain 

 conditions of preservation, or of individual toughness of this substance, or with a^e 

 thickening, the membrane becomes sufficiently stout to enable the radula to lie flat. 

 The absence of cusps iii the median teeth, and the comparative shortness of the median 

 denticle, suggest that the teeth may be worn down from age. Although the margin 

 ot the membrane of this radula is uninjured, there seems to be no trace of marginal 

 plates. 



